Every score is worked out from the vendor's own pages · How we score →Disclosure
SAASINSPECTOR
Head-to-head · AI site search tools · facts checked 24 Sept 2026

Fast Simon vs Luigi's Box

Fast Simon scores 7.6 to Luigi's Box's 7.5 among the AI site search tools we rate, and is the better pick for 1 of the 4 kinds of buyer below.

Fast Simon
#1 of 5 AI site search tools
7.6
/ 10
From
$39.99/mo (Starter)
Free plan
Yes
Luigi's Box
#2 of 5 AI site search tools
7.5
/ 10
From
Custom pricing, not published
Free plan
Yes
The verdict

Fast Simon wins, 7.6 to 7.5

Fast Simon's paid plans start at $39.99 a month and scale with your traffic sessions. Luigi's Box publishes no price at all, though both tools offer a free plan to start on. Fast Simon also searches by image, a feature Luigi's Box does not have. Both personalize results per shopper, but Luigi's Box connects to more store platforms and integrations.

Pick Fast Simon if you want image search and a clear monthly price.

Pick Luigi's Box if you need more store platforms and integrations covered.

Best for

Who each one suits, decided on the criteria that matter to that buyer and the checked facts where the two differ.

Stores that want search to feel personal
Fast Simon
Fast Simon 10.0 · Luigi's Box 5.5 on what the search does beyond the basics
  • Search by image: Fast Simon yes, Luigi's Box no
Stores on more than one platform
Luigi's Box
Fast Simon 8.0 · Luigi's Box 9.2 on where it plugs in
  • Apps it connects to: 16 integrations against 7 integrations
  • Store platforms it works with: 7 store platforms against 5 store platforms
Small stores watching cost
Too close to call
Fast Simon 7.7 · Luigi's Box 7.9 on pricing
  • Cheapest paid plan, monthly: Fast Simon $39.99, Luigi's Box custom pricing, not published
  • What the price grows with: Catalogue_size against Sessions
Stores with privacy requirements
Luigi's Box
Fast Simon 4.5 · Luigi's Box 6.5 on privacy and trust
  • Ways to reach support: 2 support channels against 1 support channel
  • GDPR: Luigi's Box yes, Fast Simon does not say
Section 01

How they score

Both are scored the same way, against the other AI site search tools we rate, from facts on each vendor's own pages. Luigi's Box leads on 3 of 4 criteria.

What the search does beyond the basics20% of the score
Fast Simon10.0
Luigi's Box5.5
Where it plugs in25% of the score
Fast Simon8.0
Luigi's Box9.2
Pricing35% of the score
Fast Simon7.7
Luigi's Box7.9
Privacy and trust20% of the score
Fast Simon4.5
Luigi's Box6.5
How the score works →
Section 02

Where they differ

Every point where the two vendors' published facts disagree, with a link to where each fact was read. "Not published" means the vendor does not say either way.

Search by image
Fast Simon
Fast Simon
Yes
source ↗
Luigi's Box
No
source ↗
Store platforms it works with
Luigi's Box
Fast Simon
5 store platforms
source ↗
Luigi's Box
7 store platforms
source ↗
Apps it connects to
Luigi's Box
Fast Simon
7 integrations
source ↗
Luigi's Box
16 integrations
source ↗
What the price grows with
Luigi's Box
Fast Simon
Sessions
source ↗
Luigi's Box
Catalogue_size
source ↗
Ways to reach support
Luigi's Box
Fast Simon
1 support channel
source ↗
Luigi's Box
2 support channels
source ↗

Published by only one of them

Cheapest paid plan, monthly
Fast Simon
$39.99
source ↗
Luigi's Box
Custom pricing, not published
GDPR
Fast Simon
Not published
Luigi's Box
Yes
source ↗
Where they match (7)
Orders results per shopper
Fast Simon
Yes
source ↗
Luigi's Box
Yes
source ↗
Its own Shopify App Store listing
Fast Simon
Yes
source ↗
Luigi's Box
Yes
source ↗
Webhooks
Fast Simon
Not published
Luigi's Box
Not published
Free plan
Fast Simon
Yes
source ↗
Luigi's Box
Yes
source ↗
Setup fee on top
Fast Simon
Not published
Luigi's Box
Not published
Does not train AI on your store data
Fast Simon
Not published
Luigi's Box
Not published
SOC 2
Fast Simon
Not published
Luigi's Box
Not published
Section 03

Pricing, plan by plan

Every plan each vendor publishes, monthly and yearly where both are offered.

Fast Simon

Free
Free
100 monthly sessions, instant search, autocomplete
Starter
$39.99/mo · $399.96/yr
Essential
$99.99/mo · $999.96/yr
Top Pro
$299.99/mo · $2,999.88/yr

Luigi's Box

Free
Free
On Shopify: AI search and analytics up to 5,000 indexed units

For everything else about each tool, read the full Fast Simon review and Luigi's Box review.

Section 04

Fast Simon vs Luigi's Box: common questions

Which is better, Fast Simon or Luigi's Box?

Fast Simon scores 7.6 and Luigi's Box 7.5 out of 10 among the AI site search tools we rate. Fast Simon is ahead on what the search does beyond the basics. Luigi's Box is ahead on where it plugs in, pricing and privacy and trust.

Do Fast Simon and Luigi's Box have a free plan?

Yes, both do.

What can Fast Simon do that Luigi's Box cannot?

On the facts both vendors publish: search by image.

Keep comparing